Automatic gearless transmission



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T. GENSMER ET AL AUTOMATIC GEARLE SS TRANSMISSION Filed Dec. 24. 1924 5SheetsS,heet

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O Q 7 I Aug 27 T. GENSMER ET AL AUTOMATIC GEARLESS TRANSMISSION FiledDec. 24. 1924 5 Sheets-sheet ./h Men fora.

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Patented tag. 9, 1927.

THEODORE GENSMER AND ROBERT Z. FARMER, PORTLAND, OREGON, ASSIGNOBS TOAUTOMATIC TRANSMISSION COMPANY, A. CORPORATION OE OREGON.

AUTOMATTC GEARLESS TRANSMISSION.

Application filed December 24, 1924. Serial no. 757,184.:

This invention relates to improvements in automatic variable speedtransmission apparatus generally, and particularly to the adaptation ofsuch devices to the power transmission of automobiles.

The object of our invention is the provision of simple and practicableapparatus to transmit the power of the motor of an automobile to thedrive wheels with variable speeds and withou'tthe employment of gearingor otherstepped variations in speed.

A further object of the inventionis to provide apparatus of simpleconstruction having definite high and low speeds as governed by thecontrolled speed of the engine and with intermediate speeds ofindeterminate and practically infinite number ac tuated automatically asrequired in the performance of the car under the effective load asdetermined by the weight carried, incline of road and other factors, theapparatus being self-controlled and in balance with the work to 'beperformed to obviate manual change of the speed ratios of engine andpropeller-shaft. e

A still further object of our invention is the provision of reversingdevices included in the same apparatus and actuated in substantially thesame manner as the forward drive'thereof.

7 Other objects and advantages, and objects relating to means ofoperation and control together with accessory parts will be fully setforth in the detailed description to follow. The accompanying drawingsillustrate by way of example an embodiment of our mvention in itsselected form, in which:

I Figure 1 is a view in side elevation of apparatus embodylng our1nvent1on, shown tially indicated the operative parts shown partly inplan and f partly in horizontal cross-section and in their neutralposition. i

Fig. 3 is 'a'view similar-to Fig. 2 illustrating the rap'er'ative partsin their advance positions an with the rearv portions shown inplan.

mounted as in anlautomobile which is par-' Fig. 4 is a view similar toFig. 3 with the parts in reverse ,positionand-with the forward partsshown in plan.

Fig. 5 isa' view in complete vertical cross section as on'line'5-5 ofFig. 2.

Fig. 6 is a view in complete vertical cross section as on line 66 ofFig. 2.

Fig. 7 is a detached view in side elevation 'of the dr1v1ng-frameelement of the invention.

Fig. 8 is a view in cross section on linev 8-8 of Fig. 7.

Fig. 9, is a' view in cross section on line 99 of Fig. 7.

Fig. 10 is a v1ew in cross section on line 1010 of Fig. 7.

Fig. 11 is a view in cross section on line 11-11 of Fig. 7.

Figs. 12, 13 and 14 are diagrammatical views lllustrating the operationof the invention.

Referring to said views, the reference thi meral 1 indicates the lowerhalf-section of the external housing of our improved .Vfil'lable speedtransmission apparatus and 2 the upper half-section thereo Said lowersection may be formed with laterally directed lugs 3 through which itmay be rigidlyse-i cured .to the frame of the automobile chassis. Saidhousing is formed in bi-lateral symmetry and its longitudinal axis is inline with the similar ax1s of the car. Said housing is formed withbearing-apertures 6 at each end, one-half of each said aperture 6 beingformed in each said section and bear- 1ng-brasses 10 are seated therein,the sections also being rigidly clampedtog ether upon each side of saidbearings through bolt-holes Internally of said housing the lower section1 is formed withprojecting lugs 12 at each side projectinginwardly insubstantially the plane of. its marginal flange 13. Annularbearing-straps 15 and 16 are provided with lugs 17 and rigidly connectedto said lugs 12. The forward strag formed with an inturned marginal aand the strap 16, is formed wlth an annular ledge 20. 1

A cylinder 21 is rotatably mounted in said bearing-straps 15 and 16. Therear relative- 1y perpendicular face of said cylinder bears relativelyperpendicular face 23 of the cylinder is confined by said flange 18,. aball thrust-bearing 24 being positioned therebetween.-

A clutch of the roller type is formed 1n the perimeter of saidcylinder'acting against-the inner face of said strap and consists in aplurality of spaced re-entrant angular notches 25 about the forwardperiphery of the cylinder and having in each sai notch a roller 26. Saidnotches are arranged and.dis-

f posed so that the cylinder may rotate freely extending shank 56between which and the 1n the same rot'ary direction as themotorcrank-shaft 8 but will be firmly locked against rotation by said clutchin the contrary direction.

f To the rear of. said cylinder 21 an ex-Y ternally cylindrical casing27 of about the same diameter as said cylinder is rigidly or integrallyconnected at its forward end to said strap-bearing 16.

I Said cylinder 21 is formed internally with an axially disposed conicalchamber 28 having its lar er end directed toward the rear and its smaer, front end e'xtendin in a cylindrical bore 30 and in a reduced ore 31throu h the forward face 23 of the cylinder. 'fihe casing 27 issimilarlyformed '.'with a tapered chamber 32 dispo1ed oppositely to said chamber28 of the cylinder thus having its larger end facing forwardly in axialalignment with the larger end of cham- V ber 28. Said chambers areofsubstantia-lly the same dimensions and with. the same in 'clinationsof their diverging walls 33 and 34, respectively. The casin 27 'isfurthenformed with a bore 35 at t e rear of its-chamber 32 extendingthrough the rear wall of Hie casing.

': forward side of the rin A rotatable frame 36 is mounted in saidchambers 28 and 32, see Fig. 7, consi ting in circular disks 37 and 38respectively positioned in the smaller opposite endsof said chambers to.rotate therein, and a medial ring 40 of larger diameter rotatablysupported in the bearing-'stra 16 or recessed endof 'the casing 27. Sairing .may be formed ofparts,'as shown, rigidly connected ing pins 68extending in horizontal direc+ tions andto which a yoke-lever 70 isconnected. A loose ring 71" is mounted-on said discrete togather y pins41.

isposed in I reg- ,ular spaced re ation to. provide roller spaccs 43therebetween. Between said bars-uponthe and in the opposingface of theforward sai disk, 37, recesses 45 are formed from-their outercircumferences and inner marginal edges to; provide aligned seats for a-rollers.46 formed or provid urality of p eflylindrical steel withtrlmnions 47 at their opposite ends to be rotatably supinsaid, v t therear; ofsaid ringbetweentsaid bars aid rings and disks are rigidlyconnected 7 together bytapered bars 42 42 deeper recesses 48 are formedin each of which a slotted block 50 is seated." Said rear disk 38 issimilarly recessed to receive slotted blocks 51 between said b'ars.Tapered rollers 52 and 53 formed with trunnions 55 are rotatably mountedin superimposed radial relation in said slotted blocks 50 and 51. Saidrollers 52 and 53 are disposed with their smaller ends directedrearwardly and roll upon each other at their meeting line while thecircumference of the outer roller 53 may lie parallel with the interiorwall- 34 of the casing through the free support of the trunnions 55 inthe slotted bloc s.

Said disk 38 is formed with a rearwardly casing 27a ball-bearing 57 isprovided. Said shank extends through the rear said bearingaplerture 6 tothe exterior of the housing w ere it may be keyed to a member 58 of auniversal-joint 59 in the propeller-shaft 7.

A double-cone driving member 60 in said chambers 28 and 32 is providedat its forward end with an integral shank 64 extending through anaperture in said disk 3.7 and is journaled in the forward bearing 6 ofthehousing. Forwardly of its journal support said shank is olperativelyconnected to the motor shaft 8 t rough a slotted and keyed connection,as at 61,- admittin of limited sliding movements of the cone rivingmemher. in longitudinaldirections.

. The forwardcone portion 62 of said-member 60 is formed with itsexterior face inclined at the same angle as the wall 33 of the chamber28. The rearcone portion 63 of IUD said member may be ofreduceddiametrical dimensions from the cone. portion 62 and having itssuperficies, inclined in parallel with the inclination of the innertapered rollers 52. Said cone-member 60, isshiftable in the chambers 28and 32 to operativel en age the respective cones 62 or 63 wit eit er therollers 46 or 52 or to an interi shank bearing upon .the collar 65.Confined between said ring and the front face 23 of.

the cylinderis a-fcoil-spring.' 72 about said shank adapted to exert aforward thrust upon the collar 65 and tend to yieldingly retain thecone-member sition. J q 1 a The 7yoke-lever70flis innedto a rockingarbor3 journaled int e upper portion ofthe housing, see -Fig."6,.and extendsout- 60; in its foremost pofrom all rollers in so-called is keyed itsaid shank 64 adwardly of the housing wherean operating foot-controlledlever 75 is rigidly connected A pin-81 is received within the lug-slotsand ing 27. A brake-band 78 extends about said drum and is provided withslotted lugs 80.

is supported for oscillation in a' boss 83 integral or rigidly mountedin said upper section 2 of the housing and having a hori-' zontally'disposed bore therethrough. Said 1 pin is screw-threaded on its innerend to re l ceive nuts 84 engaging upon the outer side of one of saidlugs 80 While the other lug bears against the boss 83. -A coil-spring 85upon said pin between the lugs yieldingly presses the lugs against theboss and nuts to resiliently maintain the brake-band in open inoperativeposition.

A boss 86 upon the outer side of the housing is in line with boss 83and-bored in register therewith through which the pin 81 extends. Saidboss 86 is formed with an inclined face 87 against which the inclinedface 88 of a crank-arm90 keyed to the pin 81 is opposed. A link 91connects said crank-arm 90 with a crank-arm 92 loosely mounted on therocking-arbor 73. A foot-controlled brake-lever 93 is integrallyconnected with the crank-arm 92. F T

The emergency brake lever 95 is connected by link-rod 96 with theemergency brake, not shown, associated with the rear driving wheels. Arod 97 'is ivotally-connected to screw-threaded at its opposite end' toreceive an adjustment'-nut'98.- An arm 99 is pinned .to said rockig-arbor 73 and is formed at its opposite en with an aperture 100through.

which said rod 96 extends with. a relatively close'sliding fit. Said nutis adjusted upon.

the rod 97 so that when the emergency brakelever 95 is thrown intoaction the arm 99 will neutral. position. v

The operation of our invention may be described as follows: Referring-to Fig. 3

wherein the. apparatus 'is illustrated in its forward propellingposition, it will be seen that the spring 72 between the collar upon theshank 64' and the cylinder'21 urges the double-cone member .60 forwardlyto bring the forward cone 62 into pres ed operative contact with therollers 46. This action is accomplished by the release of the foot-leverfrom any latch-means provided and which causes the pedal-extremity101-of said fo'ot-lever to move rearwardly under the tension of saidspring as the cone-member 60 extends forwardly.

The car motor 102 being in motion, the cone 62 is thrust forwardly intopressed contact with the rollers 46 thus pressing them against thewall.33 of the c finder 21 as they are. free to move outward y in therecesses In wh ch they are supported. Due to the cone conformation ofthe opposing surfaces of the cone and said wall 33 with the cylindricalrollers pressed therebetween upon, the motion of the cone-member aconsiderable torque force is set up in the frame 36 carrying the rollersimpelling it in the same rotary direction as the cone and which iscommunicated to the propeller-shaft 7. V

j Under relatively. light loads and at high speeds the cone-member 60,the cylinder 21 and the frame 36 will all move in unison at upon anupgrade or relatively by thrott ing down the engine to deliver lesspower from the motor the cylinder'21 will tend to lagto greater or lessdegree behind the speed of the cone. rollers 46 to rotate more or lessaccording to the difference in the rate of rotation-of. the'lower end ofthe; rake-lever and 1s' the cone and cylinder and'thereby reducing. thespeed of the frame 36 to a mean be- This condition will cause thetween-the speedsof the cone and the cylinder affording thereby areductionin speed to the driving wheels and a proportionate increaseinpower.

Such relative action of the cone and cylinder provides the intermediatedrives of the car. Such intermediate changes of speed are theoreticallyinfinite between thedescribed high speed or direct drive and the extremelow speed to be presently de-. scribed. The lagging action of thecylinder ilS determined by the load or driving; power rrquired andoperates automatically, fluctuat ng in both direction of increase orreduction of speed to give more or less power with correspondingreduction or increase in power applied to the drive Wheels.

When the thrust of the rollers 46 in their rotation is sufiici'entlygreat upon the cylinder vto cause it to reverse as it will do. underheavy demands, such as in climbing a steep hill, the clutch-rollers 26in the notches 25 will assert themselves to lock the cylinder to thebearing-strap 15 and immediately prevent such reverse rotation therebyaffording a fixed bearing for rollers 46 and increasing the leverageprovided so that the maximum power maybe communicated to the drivingwheels, as the rate of rotation of the frame '36 tothat of'the driving,

cone is practically proportionate to the diameter of the rollers and themean diameter of the cone, see diagrammatic, view, Fig; 12.

Immediately the heavy duty is removed from the apparatus, as in the carreaching a more level roadway, the cylinder will 1mmediately begin tomove with the frame and'thereby releasing the clutch-rollers andincreasing the driving speed. This entire series of change speeds iscompletely automatic and will operate continuously without thought orcontrol on the part of the driver, changing towards high speeds. as

level or downhill stretches are encountered and shifting through theintermediate speeds into extreme low, if necessary, that will deliverthe maximum of power of the engine as the steeper hills are met Thedriver may operate his car with ease with only the gas-throttle tocontrol the- .stream of power delivered to the apparatus and allvariations in the application of the power, to the driving wheels isperformed instantly and inerrantly as the requirements upon the properperformance of the. car

I by latch-devices, not shown. -This action varies. I

By referring. to Fig. 2'the apparatus may be seen inneutral positionwherein the conedriving member 1s unengagedat both its ends andconsequently the. engine crankshaft is cut off from the propeller-shaft.To accomplish this the driver presses the I foot lever forwardly abouthalfwayof itstravel wherea-t it may be releasably held causes thecone-member 60 to shift rearwardly partially compressing the spring 72.

and maintains the cone out of engagement with the frame-rollers anddisconnects the engine from the driving wheels.

- To place the car in reverse the foot-pedal is pressed fully forward tocause the conemember .toshift into its rearmost position,

'see Fig. 4, where the" cone 63 engages the tapered rollers 52 torevolubly actuate them in the oppositerotary direction and which inturncause the outer j rollers 53 to rotate in similar directions to-the conewhile the frame 36 will be caused to rotate oppositely to the conegiving a reverse direction of revolution to the-propeller-shaft.. asillustrated in .Fig.- 14. The casing 27 is held stationary at all timesmaking the reverse drive of. the car the equivalent of the lo\ speed ofthe forward drive heretofore de- 4 scribed.

Qne of. the advantageous features of the invention resides-in the actionof the apparatus in locking-the-wheels of .the car when the cone-memberis inengagement in either advance or reverse frommovements in a contrarydirection. Thus when the cone 62 isin engagement with the rollers 46 thea fixed casin car. will be locked from reverse movements as power fromthe drive-wheels through the drive wheels will-retardthe frame36 with aslowing down of the cylinder 21 due to the relatively reverse rotationof the rollers '46 and an equivalent increase in power through the frameto the drive wheels.

Such action will automatically adjust iti self to the exact amount ofchange required I to transport the load at the rate of speed determinedby the energy delivered by the engine, so that no power is lost nor isthe power. to the drive wheels cut ofi atany time in the changes made asis the casewlth geared transmissions.

v level the speed will pick up and as it becomes steeper the As the roadbecomes more speed will be cut down and the power. in-

creased until the extreme low point where thecylinder 21 is locked sothat the max imum power of the car may be exerted.

Immediately the powerrequired becomes less the speed will increasethrough the cylinder taklng up the 'motion of the frame until at itsmaximum the cylinder, frame,

and cone-member are in unitary rotation together with the rollers 46 ata standstill.

claim as our invention, is 1- 1. Variable speed transmlssion apparatus,

consisting in a housing, annular bearing straps rigidly mountedin spacedrelation 10s.. Having described our lnvention, what we interiorly ofsaid housing, a cylinder ro-. J

tatably journaled in. said bearin -straps having an interior, axiallyconical c amber,

mounted in anal alignment with said cylinder formed with an interior,

axiall conical chamber oppositely disposed to sald cylinder-chamber, aclutch device to prevent reverse rotation of said cylinder,

arotatable frame, mounted in said chambers and 'operatively connectedwith a driven shaft, a plurality of. cylindrical rollers rotatablysupported in said frame in parallel with the inclined wall of saidcylinderchamber, a plurality; of pairs ofta ered rollers rotativelywithin said. casing-c amber, said pairs of rollers being arranged inradial, superposed su ported in said ramerelation, I a driving-memberjournaled. 1n

said housing and slidably connected to a power-driven shaft andincluding a pair of nemes s cones in inte ral opposed relation disposed1n said chain ers, respectively, and slidable to selectively engageeither of said sets of rollers, means to resiliently engage saiddriving-member with said cylindrical rollers, and means to shift saiddriving-member to engage said tapered rollers.

2. Variable speed transmission apparatus, consistlngm a housing, annularbearingstraps rigidly mounted in spaced relation interiorly'of saidhousing, a cylinder rotatably journaled in said bearing-straps having aninterior, axially conical chamber, a fixed casing mounted in axialalignment with said'cylinder formed with an interior, axially conicalchamber oppositely disposed to said cylinder-chamber, a clutch deviceto'prevent reverse rotation of said cyl; inder, a rotatable framemounted in said chambers and operatively connected with a driven shaft,a plurality of rollers rotatably supported in said frame in engagevwiththe rollers within said cylinder, and

means to shift said driving-member to engage said rollers within thecasing. I

3. Variable speed transmission apparatus, consisting in a housing, acylinder rotatably journaled in said housing having aconicalchamber'thereim'a fixed casing mounted in axial alignment with saidcylinder formed with aconical chamber oppositely disposed to saidcylinder-chamber, means to prevent reverse rotation of said cylinder, arotatable frame mounted in said chambers and operatively connected witha driven shaft, a plu- 'rality of cylindrical rollers' rotatablysuported in said .framein parallel with the -1nclined wallof saidcyllnder-chanfber, a

plurality ofpairs of tapered rollers rotatively supported in said framewithin said casing-chamber, said pairs of rollers'being arranged inradial, superposed relation, a driving-member journaled in said housingand slidably connected to a power-driven shaft and including a pair ofcones in in tegral opposed relation disposed in said chambers,respectively, and slidable to selectively engage either of said sets ofrollers,

resilient means to engage said driving-memher with saidcylindricalrollers, and means to shift said driving-member to engage said taperedrollers. I 4. Variable speed transmission apparatus,

consisting in a housingga cylinder rotatably" ]ournaled in said housinghaving a conical chamber therein, a fixed casing mounted in axialalignment with said cylinder formed I with a conical chamber oppositelydisposed to said cylinder-chamber, meansvto prevent reverse rotationof-said cylinder, a rotatable frame mounted insaid chambers andoperat-ively connected with a driven shaft, aplurality of rollersrotatably supported in said frame in engagement with the inclined wallof said cylinder-chamber, a plurality of y pairs of rollers rotativelysupported in saidframe within saidcasing-chamber, said pairs of rollersbeing arranged in radial, superposed relation, a driving-memberjournaled in said housing and slidably connected to a power-driven shaftand including a pair of cones in inte ral opposed relation disposed insaid ch'am ers, respectively, and slidable to selectively engage eitherof said sets of rollers, resilient means to engage said driving-memberwith the rollers within said cylinder, and means to-shift said.fdrivingmember to engage said rollers within the casing. I

5. Variable speed transmission apparatus,

consisting in a housing, a cylinder rotatably journaled in said housinghaving a conical chamber therein, a casing mountedin axial ahgnment withsaid cylinder formed with a conical chamber oppositely disposed to saidcylinder-chamber, a clutch device to prevent reverse rotation of saidcylinder, a rotatable frame mounted vin said chambers and operativelyconnected with a driven shaft, a plurality of'lrollers rotatablysupported in said frame in engagement with the inclined wall of saidcylinder-chamber, a plurality of rollers rotatively supported in saidframe within said casing-chamber,

and a driving-member journaled in said a housing and s idably' connectedto a powerdriven shaft and including a pair of cones in integral opposedrelation disposed in saidchambers, respectively, and slidable toselectively engage either of said sets of rollers.

6. Variable speed transmission apparatus, consisting in a housing, acylinder rotatably journaled in said'housin having'a chamber therein, acasing mounte in-axial alignment 1 with said cylinder and 'formed with acham ber disposed in axial alignment with said cylinder-chamber, meansto prevent reverse I rotation of said cylinder, a rotatable framemounted in said chambers and operatively connected with a driven shaft,a plurality of rollers rotatably supported in said frame in enga ementwith the wall of said cylindercham er, a plurality of rollers rotativelysupportedin said frame within said casing- 4 chamber, a driving-memberconnected-to a power-driven shaft and arranged to selectively engageeither of said sets of rollers, resilient means to engage saiddrivingmember with the rollers-withinsaid cylinder, and means to shiftsaid driving-member to engage the rollers within the casing.

7. Variable s eed transmission apparatus,

consistin in a ousing, a cylinder rotatably 1ournale 1n said'houslnhavmg a chamber therein, a casin mounte -1n axlal allgnment with saidcylin er and formed with a chamber disposed in axialalignment with saidcylinder-chamber, means to prevent reverse rotation of said cylinder, arotatable frame.

' mounted in said chambers and operatively connected with a drivenshaft, a plurality of rollers rotatably su. ported in said frame in engaement with t e wall of said cylindercham er, a plurality of rollersrotatively supported in said frame within said casingchamber, and adriving-member connected to a power-driven sha t and arranged toselectively engage either. 'of said sets of rollers.

8. Variable s eed transmission apparatus,

'consistin in a ousing, a c linder rotatably journale in said housingaving a conical chamber therein, means to revent reverse rotationOf'JSaId cylinder, .a rame rotatable insaid chamber and operativelyconnected; plurality of rollers with a driven shaft, a rotatablysupported in sald frame in engagement with the inclined wall of saidcylinderchamber, a driving-member journaled in 'said housing andslidably connected 'to'a power-driven shaft and including a conedisposed in .said chamber, resilient means to slidabl engage said drivin'-member with said r0 lers, and means to shi t said driving member to.disengage said rollers.

r 9. Variable s eed transmission apparatus, consistin in a ousing, acylinder rotatably journale in ,said housing aving a conical chambertherein, means to 1 revent reverse rotation of said cylinder, a ramerotatable in. said chamber and operatively- -connected with a drivenshaft, a plurality of rollers rotatably su ported' in said frame inengage ment with ,t e inclined 'wallof said cylinderchamber, and adrivin' member journaled in said housing and sli ably connected to apower-driven shaft and including a cone disposed'in said chamber.

10. Variable speed transmission apparatus, consisting in a housing, acylmder rotatably journaled in said housing having an axially arrangedinterior chamber means to prevent the reverse rotation of said cylinder,a frame rotatable in said chamber and,

operatively connected with a driven shaft,

' a plurality of rollers rotatably supported in tatively mounted in said'frame and means to prevent the reverse rotationof said cylinder, aewer-dr'iven member rotatably mounted axially of said chamber, a framerotatable between said cylinder and said member, and a luralit ofrollers mounted in said frame an. operatively engageable'with the wallof said chamber and said member.

12. Variable speed transmission apparatus, consisting in a rotatablymounted cylinder tus, consisting in a rotatably mounted cylinder havingan axially conical chamber,

means toprevent reverse rotation of, said cylinder, a ower driven memberrotatably mounted axially of said chamber including a cone-shapedportion, a conical frame rotatable between said cylinder and saidconeportion of said member, and a pluralit I of cylindrical rollersrotatively mounte msaid frame and operatively. engageable with the wallof said chamber and said coneportion. v

14. Variable speed transmission apparatus, consisting in a rotatablymounted cylinder having an axially conical chamber,

means to prevent reverse rotation of said cylinder, a power-drivenmember rotatably we mounted axially ofsaid chamber including acone-shaped portion,.a conical frame rotatable between said cylinder andsaid c'one-.

portion, a plurality of cylindrical rollers rooperatively engageablewith the wall of said c amber and said cone-portion, means to resilient-1y engage said cone-portion with said rollers and means to retain saidcone-portion out of engagement .with said rollers. 15. In variable speedtransmission apparatus, a rotatably driven element, a plurality ofrollers rotatably mounted in said element, a driving, member disposedinteriorly of said driven element havin itsiexterior' driving surface inparallel wit said rollers, and a resistance member rotatable exteriorlyof said driven element havin cal wall in parallel with ti drivingmember.

16. In variable speed transmission apparatus, a rotatably drivenelement, .a plurality e surface of said of rollers rotatably mounted insaid element,

a driving member-disposed interiorly of said driven element having itsexterior driving surface in arallel with said rollers, a resistance memer rotatable exteriorly of .said' driven element having an interiorconical wall in parallel with the surface of said driving member, andmeans to prevent the an interior coni- 1,eaa,ese

reverse rotation of said resistance member.

17. In varlable s eed transmission apparatus, a centrally cone includinga plurality of cylindrical rollers, and a resistance member exteriorlyof said frame having an interior conical wall in parallel with saidcone.

18. In variable speed transmission apparatus, an axially disposedcone-shaped rrving member, an exterior resistance member hav ing aconical chamber to receive said member, a driven element interposedbetween said isposed driving cone, a rotatable frame mounted exteriorlyof said members, and a plurality of cylindrical rollers engageable withboth of said'member's.

19. In variable speed transmission apparatus, an axially disposedcone-shaped driving member,'a rotatable exterior resistance memberhaving a conical chamber in parallel with said driving member, a drivenelement interposed between said members, and a plurality of cylindricalrollers mounted in said element engageable with both said members.

THEODORE GENSMER. ROBERT z. FARMER.

